1. An unintentional release of poop into ones undergarments while one is trying to simply fart.
2. A combination of the word 'shit' and 'fart'.
3. To be tricked by ones body into thinking one needs to only fart and to be surprised by the emission of poop.
1. I was feeling gassy at the party and went over to the corner to fart away from the crowd but accidentally sharted and had to go home early.
2. I tried to fart really loud in my friend's car as a joke but ended up sharting and ruining my boxers.